plumb bob

n.

铅锤；

Plumb bob
Plumb-bob
Plumb bob
Memorial: John Alexander Forman (1927-2000)
Genome-wide end-sequenced BAC resources for the NOD/MrkTac{star, open} and NOD/ShiLtJ{star, open}{star, open} mouse genomes
Shadow in the USA
PLUMB BOBS and ADVERTISING
A GAUGE FOR USE IN A SURGICAL PROCEDURE
A gauge for use in a surgical procedure
Stoped blocks in plutons: paleo-plumb bobs, viscometers, or chronometers?
An evaluation of the supraclavicular plumb-bob technique for brachial plexus block by magnetic resonance imaging.
Ultrasound-guided supraclavicular brachial plexus block: a modified Plumb-Bob technique.
Supraclavicular brachial plexus anesthesia using the plumb bob method